<template>
  <div class="swiper-container">
    <div class="swiper-wrapper">
      <div class="swiper-slide">
        <Swiper :options="swiperOptions">
          <SwiperSlide  v-for="(img,index) in skuInfo.skuImageList" :key="img.id">
            <img :src="img.imgUrl" 
            @click="changeimg(img.imgUrl,index)"
            :class="{active:activeIndex == index}"
            >
          </SwiperSlide>
        </Swiper>
        
      </div>
    </div>
    <!-- 左右按钮 -->
    <div class="swiper-button-prev" slot="button-prev"></div>
    <div class="swiper-button-next" slot="button-next"></div>
  </div>
</template>

<script>

  export default {
    name: "ImageList",
    data() {
      return {
        // 轮播图的配置项
        swiperOptions: {
          slidesPerView: 3, //容器里面同时显示多少张图片->默认1
          navigation: {
            //左右导航按钮
            nextEl: ".swiper-button-next",
            prevEl: ".swiper-button-prev",
          },
        },
        activeIndex:0 //默认第一张图片高亮
      }
    },
    props:['skuInfo'],
    methods: {
      // 全局事件总线:imglist兄弟组件给zoom通信,通知修改大图
      changeimg(imgUrl,index){
        // 接受事件
        this.$bus.$emit('changeimg',imgUrl) //第一个参数是会回调的名字,第二个参数是传的值,把图片的地址传过来
        this.activeIndex = index  //让点击的图片等于默认的图片,小图片切换联动大图片
      }
    },
  }
</script>

<style lang="less" scoped>
  .swiper-container {
    height: 56px;
    width: 412px;
    box-sizing: border-box;
    padding: 0 12px;

    .swiper-slide {
      width: 56px;
      height: 56px;

      img {
        width: 100%;
        height: 100%;
        border: 1px solid #ccc;
        padding: 2px;
        width: 50px;
        height: 50px;
        display: block;

        &.active {
          border: 2px solid #f60;
          padding: 1px;
        }

        &:hover {
          border: 2px solid #f60;
          padding: 1px;
        }
      }
    }

    .swiper-button-next {
      left: auto;
      right: 0;
    }

    .swiper-button-prev {
      left: 0;
      right: auto;
    }

    .swiper-button-next,
    .swiper-button-prev {
      box-sizing: border-box;
      width: 12px;
      height: 56px;
      background: rgb(235, 235, 235);
      border: 1px solid rgb(204, 204, 204);
      top: 0;
      margin-top: 0;
      &::after {
        font-size: 12px;
      }
    }
  }
</style>